<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<main class="d_f">
  <div id="register" class="cfff d_f">账号注册</div>
  <form action="" id="myform" class="d_f">
    <h2 class="cfff">账号登录</h2>
    <input type="text" placeholder="请输入手机号码" name="telnum" id="telnum">
    <input type="password" placeholder="请输入密码" name="psd" id="psd">
    <input type="button" value="登录" id="btn">
  </form>
</main> 
</body>
</html>